/*!
 * jQuery UI Tabs @VERSION
 * http://jqueryui.com
 *
 * Copyright 2014 jQuery Foundation and other contributors
 * Released under the MIT license.
 * http://jquery.org/license
 *
 * http://api.jqueryui.com/tabs/
 */
(function( factory ) {
    if ( typeof define === "function" && define.amd ) {

        // AMD. Register as an anonymous module.
        define([
            "jquery",
            "./core",
            "./widget"
        ], factory );
    } else {

        // Browser globals
        factory( jQuery );
    }
}(function( $ ) {

    return $.widget( "ui.tabs", {
        version: "@VERSION",
        delay: 300,
        options: {
            active: null,
            collapsible: false,
            event: "click",
            heightStyle: "content",
            hide: null,
            show: null,

            // callbacks
            activate: null,
            beforeActivate: null,
            beforeLoad: null,
            load: null
        },

        _isLocal: (function() {
            var rhash = /#.*$/;

            return function( anchor ) {
                var anchorUrl, locationUrl;

                // support: IE7
                // IE7 doesn't normalize the href property when set via script (#9317)
                anchor = anchor.cloneNode( false );

                anchorUrl = anchor.href.replace( rhash, "" );
                locationUrl = location.href.replace( rhash, "" );

                // decoding may throw an error if the URL isn't UTF-8 (#9518)
                try {
                    anchorUrl = decodeURIComponent( anchorUrl );
                } catch ( error ) {}
                try {
                    locationUrl = decodeURIComponent( locationUrl );
                } catch ( error ) {}

                return anchor.hash.length > 1 && anchorUrl === locationUrl;
            };
        })(),

        _create: function() {
            var that = this,
                options = this.options;

            this.running = false;

            this.element
                .addClass( "ui-tabs ui-widget ui-widget-content ui-corner-all" )
                .toggleClass( "ui-tabs-collapsible", options.collapsible );

            this._processTabs();
            options.active = this._initialActive();

            // Take disabling tabs via class attribute from HTML
            // into account and update option properly.
            if ( $.isArray( options.disabled ) ) {
                options.disabled = $.unique( options.disabled.concat(
                    $.map( this.tabs.filter( ".ui-state-disabled" ), function( li ) {
                        return that.tabs.index( li );
                    })
                ) ).sort();
            }

            // check for length avoids error when initializing empty list
            if ( this.options.active !== false && this.anchors.length ) {
                this.active = this._findActive( options.active );
            } else {
                this.active = $();
            }

            this._refresh();

            if ( this.active.length ) {
                this.load( options.active );
            }
        },

        _initialActive: function() {
            var active = this.options.active,
                collapsible = this.options.collapsible,
                locationHash = location.hash.substring( 1 );

            if ( active === null ) {
                // check the fragment identifier in the URL
                if ( locationHash ) {
                    this.tabs.each(function( i, tab ) {
                        if ( $( tab ).attr( "aria-controls" ) === locationHash ) {
                            active = i;
                            return false;
                        }
                    });
                }

                // check for a tab marked active via a class
                if ( active === null ) {
                    active = this.tabs.index( this.tabs.filter( ".ui-tabs-active" ) );
                }

                // no active tab, set to false
                if ( active === null || active === -1 ) {
                    active = this.tabs.length ? 0 : false;
                }
            }

            // handle numbers: negative, out of range
            if ( active !== false ) {
                active = this.tabs.index( this.tabs.eq( active ) );
                if ( active === -1 ) {
                    active = collapsible ? false : 0;
                }
            }

            // don't allow collapsible: false and active: false
            if ( !collapsible && active === false && this.anchors.length ) {
                active = 0;
            }

            return active;
        },

        _getCreateEventData: function() {
            return {
                tab: this.active,
                panel: !this.active.length ? $() : this._getPanelForTab( this.active )
            };
        },

        _tabKeydown: function( event ) {
            var focusedTab = $( this.document[0].activeElement ).closest( "li" ),
                selectedIndex = this.tabs.index( focusedTab ),
                goingForward = true;

            if ( this._handlePageNav( event ) ) {
                return;
            }

            switch ( event.keyCode ) {
                case $.ui.keyCode.RIGHT:
                case $.ui.keyCode.DOWN:
                    selectedIndex++;
                    break;
                case $.ui.keyCode.UP:
                case $.ui.keyCode.LEFT:
                    goingForward = false;
                    selectedIndex--;
                    break;
                case $.ui.keyCode.END:
                    selectedIndex = this.anchors.length - 1;
                    break;
                case $.ui.keyCode.HOME:
                    selectedIndex = 0;
                    break;
                case $.ui.keyCode.SPACE:
                    // Activate only, no collapsing
                    event.preventDefault();
                    clearTimeout( this.activating );
                    this._activate( selectedIndex );
                    return;
                case $.ui.keyCode.ENTER:
                    // Toggle (cancel delayed activation, allow collapsing)
                    event.preventDefault();
                    clearTimeout( this.activating );
                    // Determine if we should collapse or activate
                    this._activate( selectedIndex === this.options.active ? false : selectedIndex );
                    return;
                default:
                    return;
            }

            // Focus the appropriate tab, based on which key was pressed
            event.preventDefault();
            clearTimeout( this.activating );
            selectedIndex = this._focusNextTab( selectedIndex, goingForward );

            // Navigating with control key will prevent automatic activation
            if ( !event.ctrlKey ) {
                // Update aria-selected immediately so that AT think the tab is already selected.
                // Otherwise AT may confuse the user by stating that they need to activate the tab,
                // but the tab will already be activated by the time the announcement finishes.
                focusedTab.attr( "aria-selected", "false" );
                this.tabs.eq( selectedIndex ).attr( "aria-selected", "true" );

                this.activating = this._delay(function() {
                    this.option( "active", selectedIndex );
                }, this.delay );
            }
        },

        _panelKeydown: function( event ) {
            if ( this._handlePageNav( event ) ) {
                return;
            }

            // Ctrl+up moves focus to the current tab
            if ( event.ctrlKey && event.keyCode === $.ui.keyCode.UP ) {
                event.preventDefault();
                this.active.focus();
            }
        },

        // Alt+page up/down moves focus to the previous/next tab (and activates)
        _handlePageNav: function( event ) {
            if ( event.altKey && event.keyCode === $.ui.keyCode.PAGE_UP ) {
                this._activate( this._focusNextTab( this.options.active - 1, false ) );
                return true;
            }
            if ( event.altKey && event.keyCode === $.ui.keyCode.PAGE_DOWN ) {
                this._activate( this._focusNextTab( this.options.active + 1, true ) );
                return true;
            }
        },

        _findNextTab: function( index, goingForward ) {
            var lastTabIndex = this.tabs.length - 1;

            function constrain() {
                if ( index > lastTabIndex ) {
                    index = 0;
                }
                if ( index < 0 ) {
                    index = lastTabIndex;
                }
                return index;
            }

            while ( $.inArray( constrain(), this.options.disabled ) !== -1 ) {
                index = goingForward ? index + 1 : index - 1;
            }

            return index;
        },

        _focusNextTab: function( index, goingForward ) {
            index = this._findNextTab( index, goingForward );
            this.tabs.eq( index ).focus();
            return index;
        },

        _setOption: function( key, value ) {
            if ( key === "active" ) {
                // _activate() will handle invalid values and update this.options
                this._activate( value );
                return;
            }

            if ( key === "disabled" ) {
                // don't use the widget factory's disabled handling
                this._setupDisabled( value );
                return;
            }

            this._super( key, value);

            if ( key === "collapsible" ) {
                this.element.toggleClass( "ui-tabs-collapsible", value );
                // Setting collapsible: false while collapsed; open first panel
                if ( !value && this.options.active === false ) {
                    this._activate( 0 );
                }
            }

            if ( key === "event" ) {
                this._setupEvents( value );
            }

            if ( key === "heightStyle" ) {
                this._setupHeightStyle( value );
            }
        },

        _sanitizeSelector: function( hash ) {
            return hash ? hash.replace( /[!"$%&'()*+,.\/:;<=>?@\[\]\^`{|}~]/g, "\\$&" ) : "";
        },

        refresh: function() {
            var options = this.options,
                lis = this.tablist.children( ":has(a[href])" );

            // get disabled tabs from class attribute from HTML
            // this will get converted to a boolean if needed in _refresh()
            options.disabled = $.map( lis.filter( ".ui-state-disabled" ), function( tab ) {
                return lis.index( tab );
            });

            this._processTabs();

            // was collapsed or no tabs
            if ( options.active === false || !this.anchors.length ) {
                options.active = false;
                this.active = $();
                // was active, but active tab is gone
            } else if ( this.active.length && !$.contains( this.tablist[ 0 ], this.active[ 0 ] ) ) {
                // all remaining tabs are disabled
                if ( this.tabs.length === options.disabled.length ) {
                    options.active = false;
                    this.active = $();
                    // activate previous tab
                } else {
                    this._activate( this._findNextTab( Math.max( 0, options.active - 1 ), false ) );
                }
                // was active, active tab still exists
            } else {
                // make sure active index is correct
                options.active = this.tabs.index( this.active );
            }

            this._refresh();
        },

        _refresh: function() {
            this._setupDisabled( this.options.disabled );
            this._setupEvents( this.options.event );
            this._setupHeightStyle( this.options.heightStyle );

            this.tabs.not( this.active ).attr({
                "aria-selected": "false",
                "aria-expanded": "false",
                tabIndex: -1
            });
            this.panels.not( this._getPanelForTab( this.active ) )
                .hide()
                .attr({
                    "aria-hidden": "true"
                });

            // Make sure one tab is in the tab order
            if ( !this.active.length ) {
                this.tabs.eq( 0 ).attr( "tabIndex", 0 );
            } else {
                this.active
                    .addClass( "ui-tabs-active ui-state-active" )
                    .attr({
                        "aria-selected": "true",
                        "aria-expanded": "true",
                        tabIndex: 0
                    });
                this._getPanelForTab( this.active )
                    .show()
                    .attr({
                        "aria-hidden": "false"
                    });
            }
        },

        _processTabs: function() {
            var that = this;

            this.tablist = this._getList()
                .addClass( "ui-tabs-nav ui-helper-reset ui-helper-clearfix ui-widget-header ui-corner-all" )
                .attr( "role", "tablist" )

                // Prevent users from focusing disabled tabs via click
                .delegate( "> li", "mousedown" + this.eventNamespace, function( event ) {
                    if ( $( this ).is( ".ui-state-disabled" ) ) {
                        event.preventDefault();
                    }
                })

                // support: IE <9
                // Preventing the default action in mousedown doesn't prevent IE
                // from focusing the element, so if the anchor gets focused, blur.
                // We don't have to worry about focusing the previously focused
                // element since clicking on a non-focusable element should focus
                // the body anyway.
                .delegate( ".ui-tabs-anchor", "focus" + this.eventNamespace, function() {
                    if ( $( this ).closest( "li" ).is( ".ui-state-disabled" ) ) {
                        this.blur();
                    }
                });

            this.tabs = this.tablist.find( "> li:has(a[href])" )
                .addClass( "ui-state-default ui-corner-top" )
                .attr({
                    role: "tab",
                    tabIndex: -1
                });

            this.anchors = this.tabs.map(function() {
                return $( "a", this )[ 0 ];
            })
                .addClass( "ui-tabs-anchor" )
                .attr({
                    role: "presentation",
                    tabIndex: -1
                });

            this.panels = $();

            this.anchors.each(function( i, anchor ) {
                var selector, panel, panelId,
                    anchorId = $( anchor ).uniqueId().attr( "id" ),
                    tab = $( anchor ).closest( "li" ),
                    originalAriaControls = tab.attr( "aria-controls" );

                // inline tab
                if ( that._isLocal( anchor ) ) {
                    selector = anchor.hash;
                    panelId = selector.substring( 1 );
                    panel = that.element.find( that._sanitizeSelector( selector ) );
                    // remote tab
                } else {
                    // If the tab doesn't already have aria-controls,
                    // generate an id by using a throw-away element
                    panelId = tab.attr( "aria-controls" ) || $( {} ).uniqueId()[ 0 ].id;
                    selector = "#" + panelId;
                    panel = that.element.find( selector );
                    if ( !panel.length ) {
                        panel = that._createPanel( panelId );
                        panel.insertAfter( that.panels[ i - 1 ] || that.tablist );
                    }
                    panel.attr( "aria-live", "polite" );
                }

                if ( panel.length) {
                    that.panels = that.panels.add( panel );
                }
                if ( originalAriaControls ) {
                    tab.data( "ui-tabs-aria-controls", originalAriaControls );
                }
                tab.attr({
                    "aria-controls": panelId,
                    "aria-labelledby": anchorId
                });
                panel.attr( "aria-labelledby", anchorId );
            });

            this.panels
                .addClass( "ui-tabs-panel ui-widget-content ui-corner-bottom" )
                .attr( "role", "tabpanel" );
        },

        // allow overriding how to find the list for rare usage scenarios (#7715)
        _getList: function() {
            return this.tablist || this.element.find( "ol,ul" ).eq( 0 );
        },

        _createPanel: function( id ) {
            return $( "<div>" )
                .attr( "id", id )
                .addClass( "ui-tabs-panel ui-widget-content ui-corner-bottom" )
                .data( "ui-tabs-destroy", true );
        },

        _setupDisabled: function( disabled ) {
            if ( $.isArray( disabled ) ) {
                if ( !disabled.length ) {
                    disabled = false;
                } else if ( disabled.length === this.anchors.length ) {
                    disabled = true;
                }
            }

            // disable tabs
            for ( var i = 0, li; ( li = this.tabs[ i ] ); i++ ) {
                if ( disabled === true || $.inArray( i, disabled ) !== -1 ) {
                    $( li )
                        .addClass( "ui-state-disabled" )
                        .attr( "aria-disabled", "true" );
                } else {
                    $( li )
                        .removeClass( "ui-state-disabled" )
                        .removeAttr( "aria-disabled" );
                }
            }

            this.options.disabled = disabled;
        },

        _setupEvents: function( event ) {
            var events = {};
            if ( event ) {
                $.each( event.split(" "), function( index, eventName ) {
                    events[ eventName ] = "_eventHandler";
                });
            }

            this._off( this.anchors.add( this.tabs ).add( this.panels ) );
            // Always prevent the default action, even when disabled
            this._on( true, this.anchors, {
                click: function( event ) {
                    event.preventDefault();
                }
            });
            this._on( this.anchors, events );
            this._on( this.tabs, { keydown: "_tabKeydown" } );
            this._on( this.panels, { keydown: "_panelKeydown" } );

            this._focusable( this.tabs );
            this._hoverable( this.tabs );
        },

        _setupHeightStyle: function( heightStyle ) {
            var maxHeight,
                parent = this.element.parent();

            if ( heightStyle === "fill" ) {
                maxHeight = parent.height();
                maxHeight -= this.element.outerHeight() - this.element.height();

                this.element.siblings( ":visible" ).each(function() {
                    var elem = $( this ),
                        position = elem.css( "position" );

                    if ( position === "absolute" || position === "fixed" ) {
                        return;
                    }
                    maxHeight -= elem.outerHeight( true );
                });

                this.element.children().not( this.panels ).each(function() {
                    maxHeight -= $( this ).outerHeight( true );
                });

                this.panels.each(function() {
                    $( this ).height( Math.max( 0, maxHeight -
                    $( this ).innerHeight() + $( this ).height() ) );
                })
                    .css( "overflow", "auto" );
            } else if ( heightStyle === "auto" ) {
                maxHeight = 0;
                this.panels.each(function() {
                    maxHeight = Math.max( maxHeight, $( this ).height( "" ).height() );
                }).height( maxHeight );
            }
        },

        _eventHandler: function( event ) {
            var options = this.options,
                active = this.active,
                anchor = $( event.currentTarget ),
                tab = anchor.closest( "li" ),
                clickedIsActive = tab[ 0 ] === active[ 0 ],
                collapsing = clickedIsActive && options.collapsible,
                toShow = collapsing ? $() : this._getPanelForTab( tab ),
                toHide = !active.length ? $() : this._getPanelForTab( active ),
                eventData = {
                    oldTab: active,
                    oldPanel: toHide,
                    newTab: collapsing ? $() : tab,
                    newPanel: toShow
                };

            event.preventDefault();

            if ( tab.hasClass( "ui-state-disabled" ) ||
                    // tab is already loading
                tab.hasClass( "ui-tabs-loading" ) ||
                    // can't switch durning an animation
                this.running ||
                    // click on active header, but not collapsible
                ( clickedIsActive && !options.collapsible ) ||
                    // allow canceling activation
                ( this._trigger( "beforeActivate", event, eventData ) === false ) ) {
                return;
            }

            options.active = collapsing ? false : this.tabs.index( tab );

            this.active = clickedIsActive ? $() : tab;
            if ( this.xhr ) {
                this.xhr.abort();
            }

            if ( !toHide.length && !toShow.length ) {
                $.error( "jQuery UI Tabs: Mismatching fragment identifier." );
            }

            if ( toShow.length ) {
                this.load( this.tabs.index( tab ), event );
            }
            this._toggle( event, eventData );
        },

        // handles show/hide for selecting tabs
        _toggle: function( event, eventData ) {
            var that = this,
                toShow = eventData.newPanel,
                toHide = eventData.oldPanel;

            this.running = true;

            function complete() {
                that.running = false;
                that._trigger( "activate", event, eventData );
            }

            function show() {
                eventData.newTab.closest( "li" ).addClass( "ui-tabs-active ui-state-active" );

                if ( toShow.length && that.options.show ) {
                    that._show( toShow, that.options.show, complete );
                } else {
                    toShow.show();
                    complete();
                }
            }

            // start out by hiding, then showing, then completing
            if ( toHide.length && this.options.hide ) {
                this._hide( toHide, this.options.hide, function() {
                    eventData.oldTab.closest( "li" ).removeClass( "ui-tabs-active ui-state-active" );
                    show();
                });
            } else {
                eventData.oldTab.closest( "li" ).removeClass( "ui-tabs-active ui-state-active" );
                toHide.hide();
                show();
            }

            toHide.attr( "aria-hidden", "true" );
            eventData.oldTab.attr({
                "aria-selected": "false",
                "aria-expanded": "false"
            });
            // If we're switching tabs, remove the old tab from the tab order.
            // If we're opening from collapsed state, remove the previous tab from the tab order.
            // If we're collapsing, then keep the collapsing tab in the tab order.
            if ( toShow.length && toHide.length ) {
                eventData.oldTab.attr( "tabIndex", -1 );
            } else if ( toShow.length ) {
                this.tabs.filter(function() {
                    return $( this ).attr( "tabIndex" ) === 0;
                })
                    .attr( "tabIndex", -1 );
            }

            toShow.attr( "aria-hidden", "false" );
            eventData.newTab.attr({
                "aria-selected": "true",
                "aria-expanded": "true",
                tabIndex: 0
            });
        },

        _activate: function( index ) {
            var anchor,
                active = this._findActive( index );

            // trying to activate the already active panel
            if ( active[ 0 ] === this.active[ 0 ] ) {
                return;
            }

            // trying to collapse, simulate a click on the current active header
            if ( !active.length ) {
                active = this.active;
            }

            anchor = active.find( ".ui-tabs-anchor" )[ 0 ];
            this._eventHandler({
                target: anchor,
                currentTarget: anchor,
                preventDefault: $.noop
            });
        },

        _findActive: function( index ) {
            return index === false ? $() : this.tabs.eq( index );
        },

        _getIndex: function( index ) {
            // meta-function to give users option to provide a href string instead of a numerical index.
            if ( typeof index === "string" ) {
                index = this.anchors.index( this.anchors.filter( "[href$='" + index + "']" ) );
            }

            return index;
        },

        _destroy: function() {
            if ( this.xhr ) {
                this.xhr.abort();
            }

            this.element.removeClass( "ui-tabs ui-widget ui-widget-content ui-corner-all ui-tabs-collapsible" );

            this.tablist
                .removeClass( "ui-tabs-nav ui-helper-reset ui-helper-clearfix ui-widget-header ui-corner-all" )
                .removeAttr( "role" );

            this.anchors
                .removeClass( "ui-tabs-anchor" )
                .removeAttr( "role" )
                .removeAttr( "tabIndex" )
                .removeUniqueId();

            this.tablist.unbind( this.eventNamespace );

            this.tabs.add( this.panels ).each(function() {
                if ( $.data( this, "ui-tabs-destroy" ) ) {
                    $( this ).remove();
                } else {
                    $( this )
                        .removeClass( "ui-state-default ui-state-active ui-state-disabled " +
                        "ui-corner-top ui-corner-bottom ui-widget-content ui-tabs-active ui-tabs-panel" )
                        .removeAttr( "tabIndex" )
                        .removeAttr( "aria-live" )
                        .removeAttr( "aria-busy" )
                        .removeAttr( "aria-selected" )
                        .removeAttr( "aria-labelledby" )
                        .removeAttr( "aria-hidden" )
                        .removeAttr( "aria-expanded" )
                        .removeAttr( "role" );
                }
            });

            this.tabs.each(function() {
                var li = $( this ),
                    prev = li.data( "ui-tabs-aria-controls" );
                if ( prev ) {
                    li
                        .attr( "aria-controls", prev )
                        .removeData( "ui-tabs-aria-controls" );
                } else {
                    li.removeAttr( "aria-controls" );
                }
            });

            this.panels.show();

            if ( this.options.heightStyle !== "content" ) {
                this.panels.css( "height", "" );
            }
        },

        enable: function( index ) {
            var disabled = this.options.disabled;
            if ( disabled === false ) {
                return;
            }

            if ( index === undefined ) {
                disabled = false;
            } else {
                index = this._getIndex( index );
                if ( $.isArray( disabled ) ) {
                    disabled = $.map( disabled, function( num ) {
                        return num !== index ? num : null;
                    });
                } else {
                    disabled = $.map( this.tabs, function( li, num ) {
                        return num !== index ? num : null;
                    });
                }
            }
            this._setupDisabled( disabled );
        },

        disable: function( index ) {
            var disabled = this.options.disabled;
            if ( disabled === true ) {
                return;
            }

            if ( index === undefined ) {
                disabled = true;
            } else {
                index = this._getIndex( index );
                if ( $.inArray( index, disabled ) !== -1 ) {
                    return;
                }
                if ( $.isArray( disabled ) ) {
                    disabled = $.merge( [ index ], disabled ).sort();
                } else {
                    disabled = [ index ];
                }
            }
            this._setupDisabled( disabled );
        },

        load: function( index, event ) {
            index = this._getIndex( index );
            var that = this,
                tab = this.tabs.eq( index ),
                anchor = tab.find( ".ui-tabs-anchor" ),
                panel = this._getPanelForTab( tab ),
                eventData = {
                    tab: tab,
                    panel: panel
                };

            // not remote
            if ( this._isLocal( anchor[ 0 ] ) ) {
                return;
            }

            this.xhr = $.ajax( this._ajaxSettings( anchor, event, eventData ) );

            // support: jQuery <1.8
            // jQuery <1.8 returns false if the request is canceled in beforeSend,
            // but as of 1.8, $.ajax() always returns a jqXHR object.
            if ( this.xhr && this.xhr.statusText !== "canceled" ) {
                tab.addClass( "ui-tabs-loading" );
                panel.attr( "aria-busy", "true" );

                this.xhr
                    .success(function( response ) {
                        // support: jQuery <1.8
                        // http://bugs.jquery.com/ticket/11778
                        setTimeout(function() {
                            panel.html( response );
                            that._trigger( "load", event, eventData );
                        }, 1 );
                    })
                    .complete(function( jqXHR, status ) {
                        // support: jQuery <1.8
                        // http://bugs.jquery.com/ticket/11778
                        setTimeout(function() {
                            if ( status === "abort" ) {
                                that.panels.stop( false, true );
                            }

                            tab.removeClass( "ui-tabs-loading" );
                            panel.removeAttr( "aria-busy" );

                            if ( jqXHR === that.xhr ) {
                                delete that.xhr;
                            }
                        }, 1 );
                    });
            }
        },

        _ajaxSettings: function( anchor, event, eventData ) {
            var that = this;
            return {
                url: anchor.attr( "href" ),
                beforeSend: function( jqXHR, settings ) {
                    return that._trigger( "beforeLoad", event,
                        $.extend( { jqXHR: jqXHR, ajaxSettings: settings }, eventData ) );
                }
            };
        },

        _getPanelForTab: function( tab ) {
            var id = $( tab ).attr( "aria-controls" );
            return this.element.find( this._sanitizeSelector( "#" + id ) );
        }
    });

}));
